74723890 has 32 divisors (see below), whose sum is σ = 138309120. Its totient is φ = 29052864.

The previous prime is 74723881. The next prime is 74723899. The reversal of 74723890 is 9832747.

It is an interprime number because it is at equal distance from previous prime (74723881) and next prime (74723899).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (74723899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80851 + ... + 81769.

It is an arithmetic number, because the mean of its divisors is an integer number (4322160).

Almost surely, 2^74723890 is an apocalyptic number.

74723890 is a deficient number, since it is larger than the sum of its proper divisors (63585230).

74723890 is a wasteful number, since it uses less digits than its factorization.

74723890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 74723890 is about 8644.2981207267. The cubic root of 74723890 is about 421.1981847412.

The spelling of 74723890 in words is "seventy-four million, seven hundred twenty-three thousand, eight hundred ninety".